She ended her post saying: “GOOD GOD! I did not have this with my older three.

“She knows there’s a piece of info missing but I daren’t start on about penises because we’ll never hear the end of it (in Tesco and at school and soft play really loudly probably).

“Am I being unreasonable for holding back a couple of pieces of the puzzle at age four?”

Other parents were quick to sympathise and reveal how they had dealt with similar situations.

One said: “My four-year-old hasn’t asked these questions yet. I did get asked what sanitary towels were, so gave a brief child-friendly explanation of periods. I generally try to answer any questions in an honest, child-friendly way.